<pre>  /**
   * The constants used in this Content Widget.
   */
  public static interface CwConstants extends Constants {
    String cwCheckBoxCheckAll();

    String[] cwCheckBoxDays();

    String cwCheckBoxDescription();

    String cwCheckBoxName();
  }

  /**
   * An instance of the constants.
   */
  private final CwConstants constants;

  /**
   * Initialize this example.
   */
  @Override
  public Widget onInitialize() {
    // Create a vertical panel to align the check boxes
    VerticalPanel vPanel = new VerticalPanel();
    HTML label = new HTML(constants.cwCheckBoxCheckAll());
    label.ensureDebugId("cwCheckBox-label");
    vPanel.add(label);

    // Add a checkbox for each day of the week
    String[] daysOfWeek = constants.cwCheckBoxDays();
    for (int i = 0; i &lt; daysOfWeek.length; i++) {
      String day = daysOfWeek[i];
      CheckBox checkBox = new CheckBox(day);
      checkBox.ensureDebugId("cwCheckBox-" + day);

      // Disable the weekends
      if (i &gt;= 5) {
        checkBox.setEnabled(false);
      }

      vPanel.add(checkBox);
    }

    // Return the panel of checkboxes
    return vPanel;
  }

</pre>